The FID temperature in this chromatogram was set too low in error. FID temperature should be set to 320°C for residual solvent analysis. This will not affect peak shape or elution profile, but will ensure terpenes do not condense on FID jet.

The butane used for standard preparation was a mixture of butane and isobutane in an unknown ratio. The concentrations of butane and isobutane should be considered approximate, but do not exceed 500 ppm for either component.